@misc{indiciae715cb8f49d06,
  title = {Automatic star-horizon angle measurement system},
  author = {Koerber, K. and Koso, D. A. and Nardella, P. C.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690000552},
  note = {Source identifier: 19690000552}
}